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<dxl:Comment><![CDATA[

Objective: Orca should generate a plan reasonably fast when `optimizer_xform_bind_threshold` is set to 100. By default, this query will take much longer since it generates many more groups.

create table t (a int) distributed by (a);
set optimizer_xform_bind_threshold=100;

explain select a in (
select a from t as t1 where a in (
    select a from t as t2 where a in (
	select a from t as t3 where a in (
	    select a from t as t4 join t as t5 using(a) group by t4.a
	    union
	    select a from t as t4 join t as t5 using(a) group by t4.a
	    union
	    select a from t as t4 join t as t5 using(a) group by t4.a
	)
    )
)
) from t;

]]></dxl:Comment>
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